Transition from R Studio to Cloud issue

[nzegre]

In the loop below, I am trying to create names of rasters associated with each month (e.g. 1-12) of files located in the project file directory in Cloud. There are 12 rasters in the directory.

for (m in 1:12){ #start month cycle
  if (m<10){ #conditional to build month to character
    mnchar<-paste("0",m,sep="") #add a 0 to months below October
  } else { #conditional for months larger than October
    mnchar<-toString(m) #months from October to December convert directly to character
  } #end of conditional to write month as character
 
  # Generates name of monthly rasters
crasnam<-paste("PRISM_ppt_30yr_normal_4kmM2_",mnchar,"_bil/PRISM_ppt_30yr_normal_4kmM2_",mnchar,"_bil.bil",sep="") 
  cras<-raster(crasnam) #open monthly raster
  pbgmn[,m]<-extract(cras,geocoords) #get monthly values by grid
  pavgmn[m,1]<-mean(pbgmn[,m]) #calculate average basin precipitation by month
  
} #end of month cycle

I am able to run the loop successfully in R Studio but not in Cloud. I suspect I am missing something obvious in the transition from Studio to Cloud. A link to the project is here:

https://rstudio.cloud/spaces/65621/project/1267157

I get the error:

Error in .local(.Object, ...) :
Error in .rasterObjectFromFile(x, band = band, objecttype = "RasterLayer", :
Cannot create a RasterLayer object from this file. (file does not exist)

thanks,
nico

[samp]

Maybe the file structure is different when you moved to rstudio.cloud. Do things work better if you modify the paste command? (It looks like the prefix "PRISM_ppt_30yr..." is duplicated)

crasnam<-paste("PRISM_ppt_30yr_normal_4kmM2_",mnchar,"_bil.bil",sep="") 

[phil_hummel]

I was thinking since the filenames are fairly complex could you put the rasters in a separate data directory and then use files.list() to get them into a vector and loop over that. Would simplify the code.

[nzegre]

Thank you, this was successful. It looks like I retained part of the file path from my local machine to Cloud. I appreciate the support!
best wishes, nico

[nzegre]

Agreed, I will work on simplifying it. thank you so much for the insight.
best wishes,
nico